foursome

This term describes a specific grouping of four individuals, most commonly associated with recreational sports like golf or tennis where a quartet is the standard unit of play. It carries a connotation of organized social interaction and shared activity, often implying a balanced or symmetrical arrangement of participants.

In a different social register, the word is used as a euphemism for a sexual encounter involving four people. While the sporting usage is neutral and common in public settings, the sexual usage is intimate and typically occurs in private or adult-oriented contexts.